pjbooks Chapter 309 3 meters!
Chapter 309 3 meters!
The sea-devouring shark cut southeast at a cruising speed of 42 knots at a depth of 180 meters.
Zhang Yan took a bite of the rice ball that Nie Qingcheng had made.
The rice was packed too tightly, the filling was too much, and the shape was crooked and messy; its appearance would probably only get a 3 out of 10.
The taste was surprisingly good.
He ate the second one, folded the insulated bag, and stuffed it into the storage compartment on the side of the seat. The sticky note with the skull drawn on it remained untouched.
On the system panel, the target coordinates are 170 kilometers away, and the light spot is flashing at a slight rate per minute.
The two red A+ grade logos, like two eyes, hang on either side of the light spot.
Zhang Yan shifted his attention away from the spot of light and began to make calculations.
The maximum diving depth of the sea shark is 12,000 meters; a depth of 3,200 meters is less than one-third of its performance limit. Water pressure is not a problem.
The problem lies with those two things.
Grade A+
He fought an A-rank Devourer Beast, only managing to defeat it by using the White Tiger's point-blank cannon. A+ means jumping one rank higher than the Devourer Beast.
And there were two of them.
The underwater environment offers no room to maneuver on land, no crushing mass like a Tyrannosaurus Rex, and no aerial advantage like a Suzaku.
All he could use were the Sea Devouring Shark's own weaponry—high-frequency oscillating cutting teeth, supercavitating torpedoes, and deep-sea high-pressure water jets.
Is the firepower sufficient?
Enough to kill one.
Two at the same time are not enough.
Zhang Yan tapped his finger twice on the control panel.
The system displays a list of storage spaces.
The White Tiger, Xing Tian, Xuan Xie, Tyrannosaurus Rex, and Vermilion Bird are all included.
But at a depth of 3,200 meters underwater, only the Black Scorpion can be deployed.
The pressure resistance limit of the Black Scorpion is four thousand meters, which is barely enough.
The problem is that the Black Scorpion's mobility is greatly reduced underwater, and the speed of its stinger and pincers is reduced to 40% of that on land due to water resistance.
The effective range of particle cannons in water will also be reduced from two kilometers on land to less than three hundred meters.
It's like throwing a land unit into the water to fight.
It works, but it's not very good.
Zhang Yan closed his eyes briefly.
He quickly mentally went through four possible scenarios.
The first strategy involves the Devouring Shark diving alone, using its speed advantage to pull away the two A+ level sharks and defeat them one by one.
Risk – The perception range of an A+ level is unknown; if the opponent can coordinate and cooperate, the speed advantage will be negated.
The second strategy involves the Black Scorpion luring one away, while the Devouring Shark concentrates its firepower to kill the other, then turning back to fight two against one.
Risk – The Black Scorpion has poor underwater mobility and cannot withstand a full-force attack from an A+ level enemy.
The third method involves pinpointing the fragment coordinates to the meter level, allowing the Devouring Shark to dive at maximum speed directly to retrieve the fragment without engaging it.
Risk – The fragment is encased in rock strata, and extraction will take time; the two A+ ratings behind him won't give him that time.
The fourth set—
Zhang Yan's fingers stopped.
He accessed the Sea Devouring Shark's ammunition inventory.
Supercavitating torpedoes, four remaining.
The combined yield of the four torpedoes is enough to create a small earthquake underwater.
What if it's used to blast through terrain instead of fighting monsters?
He currently has no data on the rock structure at a depth of 3,200 meters.
However, the system has performed a remote deep scan, so the basic geological outline should be cached.
He transferred it out.
The seabed topography near the target coordinates is a depression basin surrounded by trench walls, with the debris buried beneath the sedimentary layer in the center of the basin.
There is a rift valley passage about forty meters wide on the north side of the basin, which is the only natural entrance.
Two A+ energy signals are distributed within the basin, one patrolling directly above the debris and the other lying at the bottom of the rift passage.
One guards the gate, the other watches over the house.
A standard defensive formation.
Zhang Yan looked at the topographic map, and the smile on his lips disappeared.
A fourth plan took shape in his mind:
First, use two torpedoes to create a directional collapse on the side wall of the rift valley, burying the gatekeeper alive in the rubble—no need to kill it, just make it unable to escape for a short time.
Then the Devouring Shark charged into the basin at full speed, followed by the Black Scorpion. The two machines simultaneously suppressed the one guarding the base.
The window left for him was the time it would take for the collapse to block the rift—with A+ level power, it would take about three to five minutes to dig through the pile of rubble.
Within three to five minutes, he needs to: suppress the second A+, mine the fragments, and retreat.
very tight.
But it's not impossible.
Zhang Yan's fingers returned to the control panel, and he began to precisely calculate the torpedo's detonation angle and the load-bearing nodes of the rift sidewall.
My phone vibrated.
News about Nie Qingcheng.
"Where are we?"
Zhang Yan replied with one hand: "Still on the way, everything is normal."
Ten seconds passed.
"Is the rice ball delicious?"
"Better than last time."
"Liar, I didn't do it last time."
Zhang Yan smiled and typed: "That's progress for you."
"...Shaopin. Tell me when you get there."
"Um."
He put his phone down.
Outside the cockpit, the color of the seawater changed from deep blue to inky black.
At this depth, sunlight has completely disappeared, with only the searchlight on the mechanical shark's head casting a pale beam of light ahead.
Occasionally, bioluminescent jellyfish would drift past the edge of the light pillar, trailing long, fluorescent blue tentacles.
Quiet.
It's too quiet.
Zhang Yan glanced down at the spectrum of the passive sonar.
There was nothing there.
Even the echoes from deep-sea fish schools have disappeared.
At a depth of 3,200 meters, the density of biological activity should not be zero.
Unless something has wiped out all living things in this area.
He reduced the speed from 42 knots to 30 knots.
The sensitivity of the passive sonar is set to the highest level.
silence.
It was as if the entire ocean was collectively holding its breath at this depth.
Distance from target coordinates: 31 kilometers.
Zhang Yan retrieved the Black Scorpion from his storage space, unfolded it on the system panel, and began to preset its underwater combat parameters.
Joint torque compensation is increased by 30% to counteract water resistance.
The particle cannon's scattering angle was increased from 3 degrees to 8 degrees to compensate for insufficient underwater range.
Hydraulic clamp arm, locking the maximum output mode.
He spent fifteen minutes calibrating all the parameters.
Distance to target: 19 kilometers.
The depth has exceeded 2,400 meters.
The first abnormal signal appeared on the passive sonar.
Extremely faint, like some large creature turning over in the distance.
Direction... 15 degrees south of directly in front.
The distance... cannot be calculated precisely, but is estimated to be between eight and twelve kilometers.
The signal characteristics did not match any known deep-sea organisms in the system's database.
Zhang Yan's hand steadily pushed the control lever.
The speed dropped to twenty knots.
Increase the sonar gain by one stop.
That signal did not reappear.
But Zhang Yan knew it was there.
Distance to target: 12 kilometers.
He began to descend.
Two thousand six hundred. Two thousand eight hundred. Three thousand.
The mechanical shark's shell emitted a low creaking sound—not a structural problem, but the normal echo of metal deformation caused by increased water pressure.
The design has enough redundancy, but the sound itself adds a layer of oppression to the cockpit.
3,100 meters.
On the system panel, the two A+ grade red labels became clearer.
One was nine kilometers directly ahead, almost motionless.
The other one, two kilometers to its northwest, was making irregular circular motions at an extremely slow speed.
Those who guard the gate and those who watch the house.
The location is consistent with the results of the remote scan.